A marine composite sea strake

Abstract

The embodiment of the present application provides a marine composite sea grid, which comprises a grid seat and a sea grid, the grid seat is a cylinder shell structure penetrating through a bulkhead, an outer surface of the grid seat is fixedly arranged on the bulkhead, and an inner surface of the grid seat is spaced and fixed with a plurality of connecting ear plates at the same cross section position; the sea grid is arranged in the grid seat and is connected and fixed through bolt assemblies arranged at the connecting ear plates. The sea grid of the embodiment of the present application adopts resin-based prepreg with excellent interlayer performance and good marine environment resistance, the sea grid body manufactured has few surface defects and strong interlayer bonding force, in addition, the material has good repairable performance, after surface repair by using matrix filler repair technology, the underwater working capacity is greatly improved, and the sea grid can be well bonded with the hull antifouling paint, so that the sea grid has good antifouling performance, and in general, the composite sea grid still has high strength under water to meet the bearing requirement.

Description

Technical Field

[0001] This invention relates to the field of marine pipeline system technology, and in particular to a marine composite material sea-passing grating. Background Technology

[0002] Marine sea grates are mainly used to filter out debris mixed in the seawater, preventing it from clogging freshwater and lubricating oil heat exchangers. They also prevent debris from getting tangled in cooling water pumps, ensuring the normal operation of the ship's cooling and lubrication systems and preventing equipment malfunctions or damage caused by debris blockage.

[0003] Submarine gratings are typically installed at the outer inlet of the seawater pump pipes on the ship's hull. Traditionally, submarine gratings are made of metal, making them quite heavy. Installation requires multiple people working together and places high demands on on-site personnel and the environment. Furthermore, due to the poor resistance of metal to marine environments, submarine gratings are subject to severe corrosion during their long-term immersion in seawater, significantly shortening their lifespan and increasing the cost of later maintenance and replacement. In addition, various marine organisms gradually adhere to the submarine gratings during navigation, making it difficult for them to meet the normal operating requirements of the ship's cooling and lubrication systems. These marine organisms are also often difficult to remove, further increasing the frequency of grating replacement. This poses a significant challenge to the long lifespan and high reliability goals set by the development of ship systems. Summary of the Invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention provides a marine composite material sea-passing grating to solve the technical problems of short service life, high replacement and maintenance frequency and difficulty in replacement existing in the prior art.

[0005] This invention provides a marine composite sea-through grating, comprising: a grating base and a sea-through grating. The grating base is a cylindrical shell structure that penetrates the bulkhead, with its outer surface fixedly mounted on the bulkhead and its inner surface having a plurality of connecting lugs fixed at intervals at the same cross-sectional position. The sea-through grating is disposed within the grating base and is connected and fixed by bolt assemblies disposed at the connecting lugs.

[0006] In one embodiment, the bolt assembly includes a double-ended stud that penetrates the connecting lug and the sea-penetrating grid. A hexagonal thin nut is fitted onto the threaded rod between the connecting lug and the sea-penetrating grid on the double-ended stud, and a hexagonal nut is fitted onto the threaded rod on the outer side of the connecting lug and the sea-penetrating grid on the double-ended stud. Both the hexagonal nut and the hexagonal thin nut are threadedly engaged with the double-ended stud, and the hexagonal nuts at both ends of the double-ended stud work together to press and fix the sea-penetrating grid and the hexagonal thin nut onto the connecting lug.

[0007] In one embodiment, a double-eared retaining washer is also fitted on the double-ended stud inside the hexagonal nut.

[0008] In one embodiment, the hexagonal nut at the end of the threaded rod near the sea grating of the double-ended stud is a hexagonal cap nut.

[0009] In one embodiment, the sea-penetrating grid is integrally molded from resin-based carbon fiber composite material.

[0010] In one embodiment, both the grille seat and the connecting lug are made of stainless steel and are welded to the ship's bulkhead.

[0011] In one embodiment, the bolt assembly is made of aluminum bronze.

[0012] In one embodiment, both the grille base and the outer surface of the sea-penetrating grille are coated with antifouling paint.

[0013] In one embodiment, the connecting ear plate is fixed to the grille seat by welding.

[0014] In one embodiment, each grille seat is provided with at least six sets of connecting ear plates.

[0015] Compared with the prior art, the beneficial effects of the marine composite sea-passing grating provided in this embodiment of the invention are as follows:

[0016] 1. The sea grating provided in this embodiment of the invention is made of carbon fiber composite material, and its overall weight is reduced by 30% compared with the sea grating made of metal material, which reduces the difficulty of installation;

[0017] 2. The resin-based prepreg used in the embodiment of the present invention has excellent interlayer performance and good resistance to marine environment. The manufactured marine grating body has few surface defects and strong interlayer bonding. In addition, the material has good repairability. After surface repair by matrix filler repair technology, its underwater working capability is greatly improved. It can also bond well with the antifouling paint of the hull, so that the marine grating has good antifouling performance. Overall, the composite marine grating still has high strength underwater to meet the load-bearing requirements.

[0018] 3. The composite material sea-penetrating grating of the present invention has a simple overall form and is easy to replace. By using double-headed studs and nuts on both sides for fixing, the sea-penetrating grating body can be disassembled and replaced by removing the cap nuts during later maintenance and replacement, which is convenient for underwater operation and replacement.

[0019] 4. The composite material sea grating of the present invention has a simple and reliable connection method. It adopts double-ear retaining washers, which allows the sea grating body to be locked on the grating seat, reducing problems such as loosening caused by vibration and improving the reliability of use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a marine composite sea-penetrating grid provided in an embodiment of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of section AA in the middle;

[0022] Figure 3 for Figure 2 A schematic diagram of the structure at the connecting ear plate.

[0023] Figure label:

[0024] 1. Grille seat; 2. Connecting lugs; 3. Sea-passing grille; 4. Double-ended studs; 5. Hexagonal nuts; 6. Hexagonal thin nuts; 7. Double-ear retaining washers; 8. Bulkhead. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0027] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0028] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0029] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0030] Specific embodiments of this application are described below with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to ascertain the true intent based on the user's historical operations, and to avoid unnecessary or redundant details that would obscure this application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in various ways with substantially any suitable detailed structure.

[0031] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0032] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments described are for illustrative purposes only and are not intended to limit the scope of the invention. The following description, in conjunction with... Figure 1-3 The preferred embodiments of the present invention will be described in further detail below:

[0033] like Figure 1-3 As shown, this embodiment of the invention provides a marine composite sea-penetrating grating, comprising: a grating base 1 and a sea-penetrating grating 3. The grating base 1 is a cylindrical shell structure that penetrates the bulkhead 8, with its outer surface fixedly mounted on the bulkhead 8, and its inner surface having a plurality of connecting lugs 2 fixed at intervals at the same cross-sectional position. The sea-penetrating grating 3 is disposed within the grating base 1 and is connected and fixed by bolt assemblies disposed at the connecting lugs 2.

[0034] In one embodiment, the bolt assembly includes a double-ended stud 4 that passes through the connecting lug 2 and the sea-penetrating grid 3. A hexagonal thin nut 6 is fitted on the threaded rod between the connecting lug 2 and the sea-penetrating grid 3 on the double-ended stud 4, and a hexagonal nut 5 is fitted on the threaded rod on the outer side of the connecting lug 2 and the sea-penetrating grid 3 on the double-ended stud 4. Both the hexagonal nut 5 and the hexagonal thin nut 6 are threadedly engaged with the double-ended stud 4, and the hexagonal nuts 5 at both ends of the double-ended stud 4 cooperate with the double-ended stud 4 to press and fix the sea-penetrating grid 3 and the hexagonal thin nut 6 onto the connecting lug 2.

[0035] In one embodiment, a double-eared retaining washer 7 is also fitted on the double-headed stud 4 inside the hexagonal nut 5. The double-eared retaining washer 7 can lock the body of the sea-penetrating grating 3 onto the grating seat 1, reducing the shaking caused by vibration during use on the ship and improving the reliability of use.

[0036] In one embodiment, the hexagonal nut 5 provided at the end of the threaded rod of the double-ended stud 4 near the sea-penetrating grid 3 is a hexagonal cap nut. The hexagonal cap nut is provided on the seaward side to protect the operator during disassembly and prevent the operator from being scratched by the exposed edges of the double-ended stud.

[0037] In one embodiment, the sea-penetrating grille 3 is integrally molded from resin-based carbon fiber composite material;

[0038] In one embodiment, both the grille seat 1 and the connecting ear plate 2 are made of stainless steel and are welded together with the ship bulkhead 8. Stainless steel has excellent corrosion resistance and oxidation resistance. It can maintain good corrosion resistance in the atmosphere, fresh water and seawater, thereby improving the overall service life of the embodiment of the present invention and reducing the later maintenance cost.

[0039] In one embodiment, the bolt assembly is made of aluminum bronze, which has excellent corrosion resistance and oxidation resistance. It can maintain good corrosion resistance in air, fresh water and seawater, thereby improving the overall service life of the present invention and reducing later maintenance costs.

[0040] In one embodiment, the outer surfaces of both the grille base 1 and the sea-penetrating grille 3 are coated with antifouling paint to further extend their service life;

[0041] In one embodiment, the connecting ear plate 2 is fixed to the grid seat 1 by welding to ensure that the connecting ear plate 2 can be firmly fixed to the grid seat 1 and form an integral part with the grid seat 1, and effectively transmit the impact of the sea-penetrating grid 3 to the grid seat 1;

[0042] In one embodiment, each grille seat 1 is provided with at least six sets of connecting lugs 2 to ensure that the sea-penetrating grille 3 can be securely fixed to the grille seat 1.

[0043] This invention provides a marine composite material sea-passing grating 3. The grating effectively filters out silt, weeds, and other debris from seawater, ensuring the normal operation of the ship's cooling and lubrication systems and preventing equipment malfunctions or damage caused by debris blockage. Furthermore, this composite material sea-passing grating maintains good mechanical properties underwater, meeting the load-bearing requirements of ship navigation. It also exhibits excellent corrosion resistance and resistance to marine organism adhesion, allowing it to operate normally in complex marine environments and meet the needs of the ship's cooling system.

[0044] The composite material marine grating mainly consists of a grating base 1, a marine grating 3, double-ended studs 4, ordinary hexagonal nuts, hexagonal thin nuts 6, double-eared locking washers 7, and hexagonal cap nuts. The marine grating 3 itself is integrally molded from resin-based carbon fiber composite material. The resin-based prepreg used has excellent interlayer properties and good resistance to marine environments, resulting in a marine grating 3 with few surface defects and strong interlayer bonding. Furthermore, this material has good repairability; its surface can be repaired using matrix filler repair technology, greatly improving its underwater working capability. It also adheres well to antifouling paint on the hull, giving the marine grating 3 excellent antifouling performance.

[0045] The grating seat 1 is made of stainless steel and is welded to the ship's bulkhead 8. The double-ended studs 4, ordinary hexagonal nuts, hexagonal thin nuts 6, double-eared locking washers 7, and hexagonal cap nuts are all made of aluminum bronze. Aluminum bronze has excellent corrosion resistance and oxidation resistance. It can maintain good corrosion resistance in the atmosphere, fresh water and seawater, thereby improving the overall service life of the sea grating and reducing later maintenance costs.

[0046] The double-ended studs 4 are used to normally position the grating body 3 to the grating seat 1. Nuts are installed on both sides of the grating body 3 to secure the double-ended studs 4. The double-ended studs 4 are generally not disassembled after installation. This structural design allows the grating body to be removed simply by removing the hexagonal cap nuts during maintenance and replacement, greatly reducing maintenance difficulty. Furthermore, the double-eared locking washers 7 secure the grating body 3 to the grating seat 1, reducing swaying caused by vibrations during shipboard use and improving reliability.

[0047] A novel composite material sea-through grating is proposed. This composite material sea-through grating 3 exhibits high strength, light weight, simple structure, and excellent underwater load-bearing performance. Furthermore, the resin used facilitates installation and maintenance. It meets the requirements of convenient installation and maintenance, as well as high reliability.

[0048] The composite material sea-penetrating grating structure proposed in this invention is simple in form, lightweight, high in strength, and has good corrosion resistance. Only one person is needed to install the composite material sea-penetrating grating, shortening the installation and maintenance time and improving work efficiency. Furthermore, the sea-penetrating grating body made of composite material has good resistance to marine organism adhesion, reducing subsequent maintenance and replacement, and lowering operating costs.

[0049] Composite material sea gratings can effectively filter out mud, sand, weeds and other debris in seawater, ensuring the normal operation of the ship's cooling and lubrication systems. Compared with metal sea gratings, they reduce weight by 30%, meet the underwater load requirements during navigation, and have significant corrosion resistance and resistance to marine organism adhesion, thus reducing usage and maintenance costs.

[0050] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A marine composite material sea-penetrating grating, characterized in that, include: The grid seat (1) and the sea-penetrating grid (3) are provided. The grid seat (1) is a cylindrical shell structure that penetrates the bulkhead (8). Its outer surface is fixedly set on the bulkhead (8), and its inner surface is fixed with several connecting ear plates (2) at intervals at the same cross-sectional position. The sea-penetrating grid (3) is set in the grid seat (1) and is connected and fixed by bolt assemblies set at the connecting ear plates (2).

2. The marine composite sea-penetrating grating according to claim 1, characterized in that: The bolt assembly includes a double-ended stud (4) that passes through the connecting ear plate (2) and the sea-penetrating grid (3). A hexagonal thin nut (6) is fitted on the threaded rod between the connecting ear plate (2) and the sea-penetrating grid (3). A hexagonal nut (5) is fitted on the threaded rod on the outside of the connecting ear plate (2) and the sea-penetrating grid (3). The hexagonal nut (5) and the hexagonal thin nut (6) are threadedly engaged with the double-ended stud (4). The hexagonal nuts (5) at both ends of the double-ended stud (4) work together with the double-ended stud (4) to press and fix the sea-penetrating grid (3) and the hexagonal thin nut (6) onto the connecting ear plate (2).

3. A marine composite material sea-penetrating grating according to claim 2, characterized in that: A double-eared locking washer (7) is also fitted on the double-ended stud (4) inside the hexagonal nut (5).

4. A marine composite material sea-penetrating grating according to claim 2, characterized in that: The hexagonal nut (5) at the end of the threaded rod of the double-headed stud (4) near the sea-penetrating grid (3) is a hexagonal cap nut.

5. A marine composite material sea-penetrating grating according to claim 1, characterized in that: The sea-penetrating grille (3) is integrally molded from resin-based carbon fiber composite material.

6. A marine composite material sea-penetrating grating according to claim 1, characterized in that: The grille seat (1) and the connecting ear plate (2) are both made of stainless steel and are welded to the ship's bulkhead (8).

7. A marine composite material sea-penetrating grating according to claim 1, characterized in that: The bolt assembly is made of aluminum bronze.

8. A marine composite material sea-penetrating grating according to claim 1, characterized in that: The outer surfaces of the grille seat (1) and the sea-penetrating grille (3) are both coated with antifouling paint.

9. A marine composite material sea-penetrating grating according to claim 6, characterized in that: The connecting ear plate (2) is fixed to the grid seat (1) by welding.

10. A marine composite material sea-penetrating grating according to claim 1, characterized in that: Each grid seat (1) is provided with at least six sets of connecting ear plates (2).

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